DOI: 10.1016/j.jag.2017.02.008
Scopus记录号: 2-s2.0-85032189684
论文题名: VenSAR on EnVision: Taking earth observation radar to Venus
作者: Ghail R ; C ; , Hall D ; , Mason P ; J ; , Herrick R ; R ; , Carter L ; M ; , Williams E
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2018
卷: 64 起始页码: 365
结束页码: 376
语种: 英语
英文关键词: Earth observation
; InSAR
; SAR
; Venus
Scopus关键词: Earth
; resolution
; satellite imagery
; satellite mission
; synthetic aperture radar
; Venus
英文摘要: Venus should be the most Earth-like of all our planetary neighbours: its size, bulk composition and distance from the Sun are very similar to those of Earth. How and why did it all go wrong for Venus? What lessons can be learned about the life story of terrestrial planets in general, in this era of discovery of Earth-like exoplanets? Were the radically different evolutionary paths of Earth and Venus driven solely by distance from the Sun, or do internal dynamics, geological activity, volcanic outgassing and weathering also play an important part? EnVision is a proposed ESA Medium class mission designed to take Earth Observation technology to Venus to measure its current rate of geological activity, determine its geological history, and the origin and maintenance of its hostile atmosphere, to understand how Venus and Earth could have evolved so differently. EnVision will carry three instruments: the Venus Emission Mapper (VEM); the Subsurface Radar Sounder (SRS); and VenSAR, a world-leading European phased array synthetic aperture radar that is the subject of this article. VenSAR will obtain images at a range of spatial resolutions from 30 m regional coverage to 1 m images of selected areas; an improvement of two orders of magnitude on Magellan images; measure topography at 15 m resolution vertical and 60 m spatially from stereo and InSAR data; detect cm-scale change through differential InSAR, to characterise volcanic and tectonic activity, and estimate rates of weathering and surface alteration; and characterise of surface mechanical properties and weathering through multi-polar radar data. These data will be directly comparable with Earth Observation radar data, giving geoscientists unique access to an Earth-sized planet that has evolved on a radically different path to our own, offering new insights on the Earth-sized exoplanets across the galaxy. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79876
Appears in Collections: 气候变化事实与影响
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作者单位: Imperial College London, Civil and Environmental Engineering, London, United Kingdom; Airbus Defence and Space − Space Systems, Anchorage Road, Portsmouth, Hampshire, United Kingdom; Imperial College London, Earth Science and Engineering, London, United Kingdom; Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Dr., Fairbanks, AK, United States; Lunar and Planetary Laboratory, The University of Arizona, 1629 E. University Blvd, Tucson, AZ, United States
Recommended Citation:
Ghail R,C,, Hall D,et al. VenSAR on EnVision: Taking earth observation radar to Venus[J]. International Journal of Applied Earth Observation and Geoinformation,2018-01-01,64